Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Nomeie o oponente para 12 de maio de 2008.
 ###Tabelas: CREATE TABLE competition_record (competition_record_id AUTO_INCREMENT PRIMARY KEY, Year INT, Competition VARCHAR, Venue VARCHAR, Position VARCHAR, Event VARCHAR, Notes VARCHAR) CREATE TABLE aircraft_inventory (aircraft_inventory_id AUTO_INCREMENT PRIMARY KEY, Aircraft VARCHAR, Origin VARCHAR, Type VARCHAR, Versions VARCHAR, In service VARCHAR) CREATE TABLE 2006_data (2006_data_id AUTO_INCREMENT PRIMARY KEY, Rank INT, Airport VARCHAR, Total Passengers INT, % Change 2005/2006 VARCHAR, International Passengers INT, Domestic Passengers INT, Transit Passengers INT, Aircraft Movements INT, Freight (Metric Tonnes) INT) CREATE TABLE performances_by_clubs (performances_by_clubs_id AUTO_INCREMENT PRIMARY KEY, # INT, Nation VARCHAR, Winners INT, Runners-up INT, 3rd Place INT, 4th Place INT) CREATE TABLE league (league_id AUTO_INCREMENT PRIMARY KEY, Match INT, Date VARCHAR, Opponent VARCHAR, Venue VARCHAR, Result VARCHAR, Turbine goals VARCHAR, Attendance INT, Report VARCHAR)  
SELECT Opponent FROM league WHERE Date = 12 May 2008